Knowledge & Context

Retrieval, memory, indexing, knowledge organization, and data connectivity.

91 Projects 6 Subcategory 47 Tags

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Memory layers, context compression, and state management for AI systems.

Acontext

A context data platform for self-learning agents to store, observe, and distill experiences.

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Agentic Context Engine

Agentic Context Engine (ACE) is a framework and implementation for enabling agents to learn from experience through structured context engineering.

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AgentMemory

Persistent memory layer for AI coding agents, enabling cross-session context retention based on real-world benchmarks.

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Basic Memory

A local-first knowledge-as-Markdown system that lets LLMs read and write your memory via the Model Context Protocol (MCP).

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Claude Mem

A Claude Code plugin that captures coding-session context, compresses it with AI, and injects relevant memory into future sessions.

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Letta

Platform for building stateful agents with advanced memory and self-improvement capabilities, supporting both local and cloud deployments.

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LocalRecall

LocalRecall provides a local memory layer and knowledge base management API for agents and RAG scenarios.

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Mem0

Mem0 is a scalable memory layer for AI agents that provides long-term, personalized, and efficient memory storage and retrieval.

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Memanto

An open-source memory layer for AI agents featuring a 7-layer memory architecture that supports short-term, long-term, and semantic memory with RAG-based retrieval.

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MemOS

MemOS is an open-source Memory OS that provides long-term memory capabilities for large language models (LLMs), improving context awareness and long-term consistency.

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memU

memU is an open-source memory framework for AI companions, offering high accuracy, fast retrieval, and low cost for personalized AI experiences.

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OpenHuman is an open-source personal AI super intelligence assistant focused on privacy, simplicity, and power, featuring 118+ third-party integrations, local memory trees, an Obsidian wiki, and native voice interaction.

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OpenMemory — Explainable Long-term Memory Engine

OpenMemory is a self-hosted, sectorized semantic memory engine that delivers high-recall, cost-efficient, and explainable long-term memory for LLM applications.

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Supermemory

A high-performance, scalable memory engine and app providing a Memory API for storing, retrieving, and interacting with content in the AI era.

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TencentDB Agent Memory

Tencent's local long-term memory system for AI agents, powered by a 4-tier progressive pipeline with zero external API dependencies.

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Vector stores, ANN engines, and similarity search.

Deep Lake

A database for AI optimized for storing, querying and versioning vectors and multimodal data (images, video, audio, text) for LLM and deep learning workflows.

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Faiss

A high-performance library for similarity search and clustering of dense vectors, suitable for large-scale vector retrieval.

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Infinity

An AI-native database that delivers hybrid search over dense vectors, sparse vectors, tensors, full-text and structured data.

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Milvus

Milvus is a high-performance vector database designed for large-scale unstructured data processing.

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pgvector

pgvector is an open-source PostgreSQL extension that adds vector data types and similarity search, supporting exact and approximate search (HNSW, IVFFlat) inside Postgres.

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Qdrant

Discover Qdrant, a high-performance vector search engine that enhances similarity search and scalable deployment for efficient data retrieval.

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SeekDB

An AI-native search database that unifies vector, text, and structured data in a single engine to enable hybrid search and in-database AI workflows.

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sqlite-vector

Integrates embedding storage and vector search into SQLite, providing a cross-platform lightweight vector database extension.

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Chunking, retrieval, reranking, and indexing pipelines.

Airweave

Airweave lets agents search any app by connecting to apps, productivity tools, databases and document stores and turning their contents into searchable knowledge bases.

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ART (Agent Reinforcement Trainer)

Open-source reinforcement learning trainer from OpenPipe for training LLM-based agents.

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BISHENG

An open-source LLM DevOps platform for enterprise scenarios, offering workflows, RAG, model management and observability.

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Chroma

Chroma is an open-source embedding database for AI applications, enabling efficient search, storage, and retrieval for intelligent RAG systems.

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CocoIndex

A high-performance data processing and indexing framework for AI, supporting incremental processing and semantic indexing.

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DB-GPT

DB-GPT is an open-source framework focused on data-native applications, integrating RAG, Text2SQL, and multi-backend adapters to simplify building intelligent database-driven apps.

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DocsGPT

An open-source enterprise document agent platform combining RAG and multi-model support to provide citation-backed answers.

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Embedding Atlas

A tool that provides interactive visualizations for large embeddings, allowing you to visualize, cross-filter, and search embeddings and metadata.

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FastGPT

Discover FastGPT: a powerful platform for seamless data processing and AI workflow orchestration, enabling easy development of advanced question-answering systems.

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FinGPT

Open-source financial large language models with data pipelines, instruction tuning datasets, benchmarks and RAG toolkits.

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Firecrawl

The Web Data API for AI that turns entire websites into clean markdown or structured data for RAG and knowledge pipelines.

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Generative AI on Google Cloud

Sample code and notebooks demonstrating how to build and deploy generative AI workflows on Vertex AI and Gemini.

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GraphRAG

Discover GraphRAG, an open-source project by Microsoft Research for extracting structured knowledge from text, enhancing retrieval and enabling advanced temporal queries.

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Haystack

Haystack is an open-source framework for building retrieval-augmented generation (RAG) and semantic search applications by combining document stores, vector search, and LLMs.

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Khoj

A self-hostable 'second brain' platform that turns web pages and documents into a searchable knowledge base and supports custom agents and automations.

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LanceDB

Developer-friendly, embedded retrieval engine for multimodal AI. Search More; Manage Less.

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LangChain

A framework for building LLM-powered applications with composable components and rich integrations.

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LangChain4j

An open-source Java library that provides a unified API for integrating large language models and vector databases into enterprise Java applications.

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LEANN

Discover LEANN, the innovative AI platform that transforms your laptop into a powerful semantic search tool with zero cloud costs and full privacy.

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LightRAG

LightRAG is a lightweight Retrieval-Augmented Generation toolkit that supports document indexing, graph extraction, and deployable server/core modes.

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LlamaFarm

LlamaFarm is an open-source platform for deploying AI models, agents, vector databases, and RAG pipelines locally or remotely in minutes.

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LlamaIndex

LlamaIndex is a data framework for LLM applications that helps structure and connect private data sources to models for retrieval-augmented generation.

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LocalGPT

A private, on-premise document intelligence platform that combines hybrid retrieval and multi-model inference while keeping all data local.

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Marker

Converts PDF, image, PPTX, DOCX, XLSX, HTML, EPUB files to markdown, JSON, chunks, and HTML quickly and accurately.

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Memori

An open-source SQL-native memory engine that provides persistent, queryable context for Large Language Models.

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Memvid

Encode millions of text chunks into portable MP4 files for millisecond semantic search and offline-first AI memory.

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mgrep

A CLI-native semantic search tool for code, documents and media, with background indexing and agent integrations.

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MineContext

MineContext is a proactive, context-aware AI partner combining Context-Engineering with ChatGPT Pulse to improve dialogue coherence and retrieval in RAG scenarios.

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OpenViking

OpenViking is an open-source context database for AI Agents that unifies memories, resources, and skills with a filesystem paradigm for hierarchical retrieval and observability.

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PageIndex

PageIndex (by Vectify AI) is an open-source reasoning-based document index designed for high-accuracy retrieval over long documents.

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PandaWiki

PandaWiki is an open-source knowledge base system driven by large models, enabling fast building of intelligent documentation, FAQ and blog centers.

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Pathway LLM App

Production-ready templates for RAG and AI pipelines that support live data synchronization and large-scale document indexing.

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Perplexica

Perplexica is an open source AI-powered search engine positioned as an alternative to Perplexity AI.

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RAG-Anything

A multimodal document processing and Retrieval-Augmented Generation (RAG) system supporting unified parsing and intelligent retrieval of text, images, tables, formulas, and more.

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RAGFlow

An open-source RAG engine based on deep document understanding, supporting complex document parsing and knowledge Q&A

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SearXNG

A free, privacy-preserving internet metasearch engine that aggregates results from multiple search services and databases without user tracking.

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SemTools

A command-line toolkit for semantic search, embedding generation, and document parsing for local and CI workflows.

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text-embeddings-inference

Hugging Face's text-embeddings-inference provides an out-of-the-box text vectorization inference service, making it easy to build similarity search and semantic search applications.

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Tongyi DeepResearch

An open research agent and toolset for long-horizon information-seeking and agentic tasks, developed by Tongyi Lab (Alibaba-NLP).

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UltraRAG

A low-code RAG framework based on MCP, emphasizing visual orchestration and reproducible evaluation workflows.

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Unstructured

An open-source ETL solution to convert complex documents into clean, structured formats for language-model workflows.

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Vanna

Vanna is an open-source RAG framework that converts natural language questions into executable SQL and runs them against local databases.

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Vespa

Vespa is a distributed engine designed for online AI and big-data workloads. It excels at low-latency retrieval and inference, supporting vector search, custom scoring, and near-real-time indexing.

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Weaviate

Weaviate is an open-source, cloud-native vector database for storing objects and vectors, enabling scalable semantic search and structured filtering for AI applications.

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WeKnora

WeKnora — an open-source document understanding and retrieval framework from Tencent that combines LLMs and RAG for multimodal document search and knowledge graph construction.

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Wren AI

Open-source GenBI agent for querying databases in natural language and producing SQL, charts and AI-generated insights.

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OCR, parsing, extraction, and document understanding.

Docling

Docling: an open-source framework for document understanding and conversion, supporting PDFs, DOCX, images, audio and more.

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LangExtract

A Python library that uses LLMs to extract structured information from unstructured text and provides interactive visualization for review.

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MinerU

MinerU is a high-precision PDF document parsing tool that converts complex PDFs into machine-readable Markdown and JSON formats, supporting formula, table, image extraction and multilingual OCR.

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pdfly

A command-line tool to extract (meta)data from PDFs and manipulate PDF files at scale.

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pdfplumber

An open-source Python library built on pdfminer.six that exposes detailed PDF objects, table extraction, and visual debugging features.

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PyMuPDF

A high-performance Python library for data extraction, analysis, conversion, and manipulation of PDF and other documents.

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spaCy

A high-performance, production-ready open-source natural language processing library providing pretrained pipelines, training tools, and extensible language components.

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Stirling PDF

An open-source, self-hosted web PDF editor and processing platform that supports a wide range of PDF operations.

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Tesseract OCR

Tesseract is a powerful open-source Optical Character Recognition (OCR) engine supporting over 100 languages, widely used for text extraction and document digitization.

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Entity graphs, relationship modeling, and graph retrieval.

CodeGraph

Pre-indexed code knowledge graph for AI coding agents, supporting Claude Code, Codex, Cursor, and OpenCode with 100% local execution.

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DeepTutor

A multi-agent personalized learning system integrating RAG, knowledge graphs, and interactive visualizations.

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Understand Anything

Turn any code into an interactive knowledge graph you can explore, search, and ask questions about, with native support for Claude Code, Codex, Cursor, Copilot, and Gemini CLI.

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Data ingestion, connectors, and synchronization pipelines.